import { describe, it, expect } from 'vitest'
import { marker, dashArray, lineAttrs } from '@diagram/edges'

describe('edge markers', () => {
  it('returns null for none', () => {
    expect(marker('none', '#000')).toBeNull()
  })
  it('builds filled arrow and diamond paths', () => {
    expect(marker('arrow', '#f00')).toMatchObject({ type: 'path', fill: '#f00' })
    expect(marker('diamond', '#f00')?.d).toContain('Z')
  })
  it('builds a circle marker', () => {
    expect(marker('circle', '#0f0')).toMatchObject({ type: 'circle', r: 5 })
  })
})

describe('dash patterns', () => {
  it('scales with stroke width', () => {
    expect(dashArray('solid', 3)).toBe('none')
    expect(dashArray('dashed', 2)).toBe('6 4')
    expect(dashArray('dotted', 2)).toBe('2 3')
  })
})

describe('line attrs', () => {
  it('composes stroke, dash and markers', () => {
    const attrs = lineAttrs({ color: '#123456', lineStyle: 'dashed', strokeWidth: 4, headMarker: 'arrow', tailMarker: 'none' })
    expect(attrs.stroke).toBe('#123456')
    expect(attrs.strokeWidth).toBe(4)
    expect(attrs.strokeDasharray).toBe('12 8')
    expect(attrs.targetMarker).toMatchObject({ type: 'path' })
    expect(attrs.sourceMarker).toEqual({ d: '' })
  })
})